Phytomyza astotinensis Griffiths

Eiseman, Charles S., Lonsdale, Owen, Linden, John Van Der, Feldman, Tracy S. & Palmer, Michael W., 2021, Thirteen new species of Agromyzidae (Diptera) from the United States, with new host and distribution records for 32 additional species, Zootaxa 4931 (1), pp. 1-68 : 33

Phytomyza astotinensis Griffiths

Material examined. MASSACHUSETTS: Worcester Co ., Rutland, 42.381206, -71.964980, 9.vi.2018, em. 24.vi.2018, J.A. Blyth, ex Solidago rugosa , # CSE4689 , CNC1135714 (1♁).

Hosts. Asteraceae : Solidago canadensis L., S. flexicaulis L. (tentatively identified specimens), S. gigantea Aiton , S. latissimifolia Mill., S. * rugosa Mill. ( Eiseman & Lonsdale 2018) . We have seen leaf mines likely referable to this species on S. altissima L. and S. macrophylla Banks ex Pursh.

Leaf mine. Whitish, on the upper surface, narrow and linear throughout; frass typically in fine particles, mostly forming short beaded strips, but in some cases mostly deposited in an erratic jumble of squiggly fragments, rarely appearing as straight strips for a very short stretch ( Eiseman & Lonsdale 2018).

Puparium. Black; formed outside the mine.

Phenology and voltinism. As discussed by Eiseman & Lonsdale (2018), this species is thought to be univoltine in Alberta, where larvae collected in early August and late September emerged as adults the following spring, but it is at least bivoltine in Massachusetts, where larvae collected between 9 and 12 June emerge as adults by the end of the month, larvae collected in late July have yielded tentatively identified females in mid-August, and larvae of the overwintering generation have been collected in early October.

Distribution. USA: MA, WI?; Canada: AB ( Eiseman & Lonsdale 2018). We have found leaf mines likely referable to this species in IA and MI.